Expanded OS Support

Expanded Docker Engine Support

Docker 1.12 and 1.13 are now supported. Docker 1.13 is the default version.

Upgrades

Improved upgrade tooling and experience for on-premise installations. Upgrades now use internal DC/OS APIs to ensure nodes can be upgraded with minimal disruption to running DC/OS services on a node. The upgrade procedure has also been simplified to improve user experience.

Known Issues and Limitations

DCOS-14021 - Task logging to journald disabled by default, so task logs will continue to be written to their sandboxes, and logrotated out. The dcos task log command will work as it did before.

Marathon-7133 - Marathon application history is lost after Marathon restart.

CORE-1191 - The Mesos master's event queue can get backlogged with the default settings, causing performance problems. These can be mitigated by setting the following configuration parameter in your config.yaml file at install time. See the Configuration Reference for more information. Note: Lowering this parameter also reduces the number of tasks per framework that the dcos task subcommands can access for debugging. If you run a framework with many short tasks, such as Spark, you may not want to reduce this value.